Having spent the past decade reviewing TVs, unless ambient light is a large issue, get an OLED. The Samsung QN90A is the only TV I reviewed this year that I could live with as an LCD model, but even it still had big issues compared to getting an OLED. You can get a 65" in your budget, and it will be a bit small from the couch, I'd just move the couch forward. But to me it's an easy decision to get an LG C1 (Sony A80J was much dimmer with HDR when I calibrated them for people).
As for people that don't want a Smart TV, you just have to not connect it to the Internet. The SoC that handles all the processing and color management for the TV also handles the apps, so it's more expensive for companies to design a TV without apps than to design one with them at this point. And 99% of people are going to want them built-in. If you want a display without them, you have to go commercial, which also means no TV tuner and much higher prices since they're designed for different environments.